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Preconfiguration "PmExpr - mathematical expression"

Creation and evaluation of mathematical JavaScript expression by the PmExpr object.
 
This preconfiguration can be activated when creating a new object (e.g. by "New object" in the local object menu or after pressing the Insert key after selecting the object) and is included in the group: " / Panels (PmaPanel) / Others examples".

This preconfiguration can be used with the objects: PmaFolder or PmaRoot.

 
- Preconfiguration creates an object of the PmaFolder type containing PmaPanel and PmaData objects.
- The preconfiguration is created including the panel (object of the PmaPanel type) is functional also a Web panel.
 
This preconfiguration can be used to test and evaluate user created mathematical expression (PmExpr) in JavaScript language syntax. There are predefined variables that can be used in the expression.
 
In this preconfiguartion, there are static predefined variables in the ListVariables method of the created PmaFolder object. The ResultExpr method of this object then returns the evaluated expression that was previously passed to it in its parameter.
 
The testing panel PanelMain demonstrates the possible entries of mathematical expression in three examples. On the right side there is the evaluated value. On the bottom there are the real values of the variables that can be used in the expression. The objects used as expression entries or for displaying the results can be edited locally and their modification is immediately resulting in change of the resulting evaluated value.
 
From panel PanelMain it is possible to open PanelExpr panel by a button. It can be used as simple mathematical expression editor where it is possible to use the buttons from left to right in order to create desired expression. It is also possible to edit it also locally on spot.
These configurators can be set before the preconfiguration is created:
The name of created objectName of the object created in the tree of Pma objects. The maximum Pma object name length is 31 characters. This is a system name, so it must contain only alphanumeric and must not contain any diacritics, empty string, spaces and the first character must not be a number.

Default: "PmExpr"

Object sripting languageApplication object scripting language
0 - vbscript
1 - javascript
Enable as Web componentSpecifies whether this object has to be registered as a Web server component

After this preconfiguration is created, the configurator is se to: PmaPanel > Web server > Enable as Web component.

PmaWeb objectPath in the tree of Pma objects to the PmaWeb, PmaWebFolder or PmaWebLang object where the registration is carried out.

Macro expression can be used for input (it is evaluated after starting the application).

After this preconfiguration is created, the configurator is se to: PmaPanel > Web server > PmaWeb object.


History:
Pm8.03.20: Created
PROMOTIC 9.0.7 SCADA system documentation - MICROSYS, spol. s r.o.

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